The Under Armour Women's ColdGear Armour Compression Mock is a popular choice among women runners on Amazon. This base layer top is designed to keep you warm and comfortable during your runs. It features ColdGear fabric that traps heat and wicks away sweat, keeping you dry and cozy. The compression fit provides a supportive feel and helps reduce muscle fatigue. The mock neck design offers extra coverage and protection against the cold. With its stylish design and excellent performance, it's no wonder this base layer top is a top pick among women runners.